| Project/Area Number |
12440071
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | High Energy Accelerator research Organization |
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Principal Investigator |
MIYATAKE Hiroari IPNS, Associate Profesor, 素粒子原子核研究所, 助教授 (50190799)
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| Co-Investigator(Kenkyū-buntansha) |
IIMURA Hideki JAERI, Dept, of Materials Science, Associate Research Director, 物質科学部, 副主任研究員
ISIHYAMA Hironobu IPNS, Research Associate, 素粒子原子核研究所, 助手 (50321534)
JEONG Sunchan IPNS, Research Associate, 素粒子原子核研究所, 助手 (00262105)
OHBA Hiroonri JAERI, Dept. of Material Science Researcher, 物質科学部, 研究員
KOIZUMI Imtsuo JAERI, Dept, of Material Science, Researcher, 物質科学部, 研究員
小泉 光夫 日本原子力研究所, 物質科学研究部, 研究員
柴田 猛順 日本原子力研究所, 物質科学研究部, 主任研究員
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥15,300,000 (Direct Cost: ¥15,300,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥14,100,000 (Direct Cost: ¥14,100,000)
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| Keywords | laser ablation / resonant ionization / ECR ion-source / radioactive nuclear beams |
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| Research Abstract |
A proposed new ion-source system consists of the laser ion-source including the resonant ionization laser and the ablation laser, and the charge-breeding ECR ion-source. Research summaries of developments, 1) a resonant ionization of the short-lived 25Al, 2)a study of the laser ablation mechanism, and 3)a construction of the high-performance charge-breeding ECR ion-source, are followings.
1)A selective ionization and successive on-line mass-separation of the short-lived nuclei25Al(T1/2=7, 2sec.) was succeeded for the first time by means of the resonant ionization technique. The resonant ionization laser was tuned with the combination of the excimer laser and dye laser. The ionization efficiency was about 0.1%.
2)Velocity distributions of Nd andNd+ in the laser ablation plume was measured by the laser unduced fluorescence spectroscopy. The ablations was produced and were controlled by the YAG laser. It was found that the velocities or neutrals and ions in the 0.7 torr Ar-gas was lower than those in the vacuum circumstance by the tow orders of magnitude and one order of magnitude, respectively. This difference will be utilized for the selection of neutrals from ions. It was also found that the ablated particles were accelerated within the 20 mm from ablation point.
3)On the basis of the result of the test-bench experiments and the realistic simulation of ions in ECR-plasma, a charge-breeding ECR ion-source including the newly designed deceleration system was constructed. This device will be installed in the KEK-JAERI joint radioactive nuclear beam facility for the use of heavy radioactive nuclei.
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